Jaden and Willow Smith Ð At a ripe age, this duo separately had roles alongside their father, Will Smith, in the movies I am Legend and Persuit of Happiness. Jaden even rapped on Justin BieberÕs track, ÔNever Say Never.Õ The whole Smith family has been touring the world recently supporting Jaden in his first principal role at ÒThe Karate Kid.Ó